How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

Dwarf Planets May Finally Get Respect An international panel has unanimously recommended that Pluto retain its title as a planet, and it may be joined by other undersized objects that revolve ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Pluto was long considered our ninth planet, but the International Astronomical Union reclassified Pluto as a dwarf planet in ...

Among the roughly 10 billion white dwarf stars in the Milky Way galaxy, a greater number than previously expected could provide a stellar environment hospitable to life-supporting exoplanets ...

The dwarf planet's orbit is such an elongated ellipse that it takes around 25,000 years to make one orbit of our sun. At its closest, it sits approximately 6.66 billion kilometers away from the sun.

A dwarf planet called 50000 Quaoar that orbits beyond Neptune appears to have a ring that shouldn't be there, at 7.4 times more distant than the planet's radius.

Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was reclassified as a dwarf planet in 2006.

The redder white dwarf, known as WDJ2147-4035, is just 90 light-years away and was found to be about 10.7 billion years old, becoming a white dwarf around 10.2 billion years ago.